How to update particular field in mongo db by using MongoRepository Interface?

Question

How to update a particular field in mongo db collection by using MongoRepository Interface in spring?

Answer 1

As of today, you can't update the document using MongoRepository using one query. If you really want to update a particular field using MongoRepository then following is the steps:

1. Fetch the document that you want to update
2. Set the new value to a particular field and save that document.

Example:

MyDocument myDocumentToUpdate = myDocumentRepository.findById(documentId); // fetching a document that you want to update the field
myDocumentToUpdate.setMyField(myNewValue); // setting the new value to the field myField
myDocumentRepository.save(myDocumentToUpdate); // saving (It basically updates the document) the updated document